"I relished my time in Stuttgart," the Strikers FC goalkeeper said. "Of course, playing in the Bundesliga someday would be a dream."

As part of training programme, Klinsmann and seven of his U.S. under-18 teammates trained at various clubs throughout Europe and his father told Bild: "The lads should train at the highest level -- that's a huge experience for them. I received only positive feedback."

Klinsmann Sr., who played for Stuttgart between 1984 and 1989, added: "I am very thankful that Stuttgart enabled them to train with them."

Bild reports that his son spent 10 days in his father's hometown and predominantly trained with Stuttgart's under-17 and under-19 teams.